CN111451730B - Method for machining bent spraying type nozzle pipe of hydraulic generator - Google Patents
Method for machining bent spraying type nozzle pipe of hydraulic generator Download PDFInfo
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- CN111451730B CN111451730B CN202010350258.XA CN202010350258A CN111451730B CN 111451730 B CN111451730 B CN 111451730B CN 202010350258 A CN202010350258 A CN 202010350258A CN 111451730 B CN111451730 B CN 111451730B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B35/00—Methods for boring or drilling, or for working essentially requiring the use of boring or drilling machines; Use of auxiliary equipment in connection with such methods
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
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Abstract
The invention discloses a method for processing a bent spraying type nozzle pipe of a hydraulic generator, which comprises the following steps: 1) drawing a center cross line and a waist line, drawing two end plane processing lines and a circle correction line, and drawing a sample and punching holes; 2) positioning by using a numerical control boring machine; 3) roughly and finely boring and milling a small-head flange; 4) roughly boring a large-head flange; 5) welding a process baffle in the large-head flange; 6) roughly and finely boring the inner hole of the small-head flange and the inner hole of the technical baffle plate by using a special machine tool; 7) the inner hole of the large-head flange is roughly and finely bored by a numerical control boring machine, each hole and screw hole on the flange are bored in place, and a process baffle is bored; 8) and rotating the machine tool workbench by 180 degrees, horizontally moving, extending or contracting the boring cutter bar and the ram, correcting the finish machining of the inner hole of the flange at the small-head flange end, and boring and drilling each screw hole on the flange in place. The invention has the advantages of convenient operation and reliable use, and can effectively ensure the coaxiality of the inner holes of the flanges at the two ends, and ensure the quality of the product and the production period and delivery date of the product.
Description
Technical Field
The invention relates to a method for processing a nozzle pipe of a hydraulic generator, in particular to a method for processing a bent spraying type nozzle pipe of a hydraulic generator.
Background
The nozzle pipe in the impact type water turbine generator set is a core component for connecting a nozzle shaft, a nozzle cover, a guide frame and a nozzle servomotor, plays a vital role in the normal operation of the water turbine generator set, and therefore, the quality of a product must be strictly controlled in the production and manufacturing process of the bent spraying type nozzle pipe.
The existing manufacturing of the nozzle pipe is a part which is manufactured and formed by an assembly welding blank through machining, the machined inner hole surfaces of flanges at two ends of the nozzle pipe have very high dimensional accuracy and form and position tolerance requirements, the size of the part is large, the appearance is irregular, equipment capable of meeting the machining requirements is large, the clamping, positioning and correcting modes are complex, and the technological process for machining the inner holes of the flanges at two ends and the plane is as follows:
1. drawing a central cross line and a waist line according to the appearance, drawing a processing line of the flange planes at the two ends, a circle correction line, and drawing a sample and punching holes;
2. the nozzle pipe is supported by a screw jack at a proper position of the appearance of the nozzle pipe under the guidance of a process technician, and is matched with an electric welder by a bench worker, and workpieces such as a clinical welding process pressure plate, a nut, a tensioning screw rod and the like are clamped, fixed and firmly pressed;
3. adjusting a screw jack, clinically marking, correcting a center cross line and an end face machining line of the large-head flange, roughly and finely boring and milling the end face of the large-head flange in place, then replacing a large boring cutter, roughly boring, semi-finely boring and finely boring an inner hole of the large-head flange in place, boring and milling a ring groove of the large-head end face in place, and boring and drilling each hole and screw hole on the flange in place;
4. the rotary worktable rotates 180 degrees, the boring cutter bar moves horizontally for a distance of 2xd, and due to the complex shape and different sizes of parts, after the rotary worktable is in place, the boring cutter bar needs to be adjusted to extend or shorten for processing according to the actual clamping condition, the inner hole of the small-head flange is roughly bored, semi-finely bored and finely bored in place, the end face of the small-head flange is roughly and finely bored, and each screw hole of the boring and drilling flange is in place.
Therefore, if the workpiece is processed according to the method, the precision of the rotary table of the numerical control boring machine (namely the positioning conditions of the indexing of the rotary table and the rotating angle of the rotary table) and the movement and the extension of the boring cutter bar and the ram have extremely high precision requirements, the skill level of an operator and the familiarity of the operator to equipment are extremely high, the artificial factors are more and uncontrolled in the processing process, and errors are easy to occur, so that the later unit cannot be assembled in the preassembling process, the quality of the product cannot be guaranteed at all, and the production cycle and the delivery date of the product are seriously influenced.
Disclosure of Invention
The invention aims to provide a method for processing a bent spraying type nozzle pipe of a hydraulic generator, which can effectively ensure the coaxiality of inner holes of flanges at two ends.
The invention aims to realize the technical scheme that the method for processing the bent spray type nozzle pipe of the hydraulic generator comprises the following steps:
1) drawing a central cross line and a waist line according to the appearance, drawing a plane processing line of a flange with a large head and a small head at two ends, a circle correction line, and drawing a sample punching hole;
2) positioning by using a numerical control boring machine;
3) roughly and finely boring and milling a small-head flange;
4) roughly boring a large-head flange;
5) welding a process baffle in the large-head flange;
6) roughly and finely boring the inner hole of the small-head flange and the inner hole of the technical baffle plate by using a special machine tool;
7) the inner hole of the large-head flange is roughly and finely bored by a numerical control boring machine, each hole and screw hole on the flange are bored in place, and a process baffle is bored;
8) and rotating the machine tool workbench by 180 degrees, horizontally moving, extending or contracting the boring cutter bar and the ram, correcting the finish machining of the inner hole of the flange at the small-head flange end, and boring and drilling each screw hole on the flange in place.
In the step 2), a numerical control boring machine is loaded, a jack is used for supporting the proper position of the appearance of the nozzle pipe, a bench worker is matched with an electric welder, a clinical welding process pressing plate, a nut and a tensioning screw rod are used for clamping a workpiece, and the bent spraying type nozzle pipe is positioned.
In the step 3), adjusting a screw jack, clinically marking and correcting a central cross line and an end face machining line of the small-head flange, roughly and finely boring and milling the end face and the outer circle of the small-head flange in place, and roughly boring an inner hole to leave a margin single side of 6-7 mm.
In the step 4), the workbench is rotated by 180 degrees, the cross line at the center of the end face of the large-head flange is aligned, the allowance of the end face of the large-head flange for rough boring is 3-4 mm, the allowance of the inner hole for rough boring is 6-7 mm, and the outer circle of the bore is in place.
In the step 6), a special machine tool is used, a screw jack is used for supporting the proper position of the shape of the nozzle pipe, a bench worker is matched with an electric welder, and a clinical welding process press plate, a nut and a tensioning screw rod are used for pressing a workpiece; and (3) correcting the center and the plane of the machined small-end flange by a clinical marking table, fixing and firmly pressing the workpiece, adjusting the positions of the mechanical sliding tables at the two ends, and roughly and finely boring the inner hole of the small-end flange and the inner hole of the large-end process baffle in place.
In the step 7), a numerical control boring machine is mounted, a screw jack is used for supporting the proper position of the appearance of the nozzle pipe, a bench worker is matched with an electric welder, and a clinical welding process pressing plate, a nut and a tensioning screw rod are used for clamping a workpiece; and (3) correcting the center of the inner hole of the finish-machined large-head process baffle by a clinical dial, fixing and pressing the workpiece firmly, roughly and finely boring the inner hole, the end face and the ring groove of the large-head flange in place, boring and drilling each hole and screw hole on the flange in place, and boring off the process baffle.
In the invention, the special machine tool comprises a T-shaped workbench, bases are symmetrically arranged at two ends of the T-shaped workbench respectively, sliding guide rails are arranged on the bases, a mechanical sliding table is arranged on the sliding guide rails, a driver with a boring tool bit is arranged on the mechanical sliding table, and a boring tool bar is arranged on the boring tool bit.
By adopting the technical scheme, the invention has the advantages of convenient operation, reliable use and low cost, and can effectively ensure the coaxiality of the inner holes of the flanges at the two ends, reduce the operation difficulty, improve the processing efficiency and ensure the quality of the product and the production period and delivery date of the product.
Drawings
The drawings of the invention are illustrated as follows:
FIG. 1 is a schematic view of the construction of a bent spray nozzle tube of the present invention;
fig. 2 is a schematic structural diagram of the special machine tool of the invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited to these embodiments, and any modifications or substitutions in the basic spirit of the embodiments will still fall within the scope of the present invention claimed in the claims.
Example 1: as shown in fig. 1, a method for processing a hydro-generator bent spray nozzle pipe comprises the following steps:
1) drawing a central cross line and a waist line according to the appearance, drawing plane processing lines of large heads and small heads of flanges 1 and 2 at two ends, correcting the lines by circles, and drawing a sample and punching holes;
2) positioning by using a numerical control boring machine;
3) roughly and finely boring and milling a small-head flange 2;
4) roughly boring a large-head flange;
5) welding a process baffle in the large-head flange 1;
6) roughly and finely boring the inner hole of the small-head flange 2 and the inner hole of the technical baffle plate by using a special machine tool;
7) the inner hole of the large-head flange 1 is roughly and finely bored by a numerical control boring machine, each hole and screw hole on the flange are bored in place, and a process baffle is bored;
8) and rotating the machine tool workbench by 180 degrees, horizontally moving, extending or contracting the boring cutter bar and the ram, correcting the finish machining of the inner hole of the flange at the end 2 of the small-head flange, and boring and drilling each screw hole on the flange in place.
Further describing, in the step 2), in order to fix the nozzle pipe, a numerical control boring machine is used, a screw jack is used for supporting the proper position of the appearance of the nozzle pipe, a bench worker is matched with an electric welder, a clinical welding process press plate, a nut and a tensioning screw rod are used for clamping a workpiece, and the bent spraying type nozzle pipe 4 is positioned.
Further describing, in the step 3), a screw jack is adjusted, a clinical dial is made to correct a central cross line and an end face machining line of the small-head flange 2, the end face and the outer circle of the small-head flange 2 are roughly and finely bored and milled in place, and a single side with a margin of 6-7 mm is reserved in a roughly bored inner hole.
Further describing, in the step 4), the workbench is rotated by 180 degrees, the central cross line of the end face of the large-head flange 1 is aligned, the allowance of the end face of the large-head flange 1 for rough boring is 3-4 mm, the allowance of the inner hole for rough boring is 6-7 mm, and the outer circle of the bore is in place.
Further describing, in the step 6), in order to fix the nozzle pipe on a special machine tool, the special machine tool is used, the proper position of the shape of the nozzle pipe 4 is supported by a screw jack 3, a bench worker is matched with an electric welder, and a clinical welding process pressure plate, a nut and a tensioning screw rod 5 are used for pressing a workpiece; and (3) correcting the center and the plane of the machined small-end flange 2 by a clinical dial, fixing and firmly pressing the workpiece, adjusting the positions of the mechanical sliding tables at the two ends, and roughly and finely boring the inner hole of the small-end flange 2 and the inner hole of the large-end process baffle in place.
Further describing, in the step 7), a numerical control boring machine is arranged, a screw jack 3 is used for supporting the proper position of the shape of the nozzle pipe 4, a bench worker is matched with an electric welder, and a clinical welding process press plate, a nut and a tensioning screw rod 5 are used for clamping a workpiece; and (3) correcting the center of the inner hole of the finish-machined large-head process baffle by a clinical dial, fixing and pressing the workpiece firmly, roughly and finely boring the inner hole, the end face and the ring groove of the large-head flange 1 in place, boring and drilling each hole and screw hole on the flange in place, and boring off the process baffle.
As shown in fig. 2, in the present invention, the special machine tool includes a T-shaped table 6, bases 7 are symmetrically disposed at two ends of the T-shaped table 6, respectively, a sliding guide 8 is disposed on each of the bases 7, a mechanical sliding table 9 is disposed on the sliding guide 8, a driver 11 with a boring tool bit 10 is disposed on the mechanical sliding table 9, and a boring tool bar 12 is disposed on the boring tool bit 10.
In the invention, the coaxiality of the large-head flange 1 and the small-head flange 2 can be effectively ensured by the method; the special machine tool adopts a large platform of a T-shaped workbench 6 to clamp and position a workpiece, bases 7 are arranged on two sides, a mechanical sliding table 9 and a driver 11 are installed on the bases 7, a limiting device is arranged on the bases 7, a boring cutter head 10 is arranged on the mechanical sliding table 9, a special boring cutter rod 12 is installed, the coaxiality is within phi 0.03mm, bent spray type nozzle pipes with different sizes are arranged on the workbench, a screw jack 3 is used for supporting and adjusting, a tightening screw rod, a pressing plate, a nut and the like are fixed and firmly pressed, and the inner holes of large-head flanges 1 and small-head flanges 2 at two ends are subjected to rough and fine boring and milling through the movement of the mechanical sliding table 9 and the rotation of the boring cutter head 10, so that the coaxiality of the inner holes of the flanges at two ends is ensured.
Claims (6)
1. A method for processing a bent spraying type nozzle pipe of a hydro-generator is characterized by comprising the following steps:
1) drawing a central cross line and a waist line according to the appearance, drawing a plane processing line of a flange with a large head and a small head at two ends, a circle correction line, and drawing a sample punching hole;
2) positioning by using a numerical control boring machine;
3) roughly and finely boring and milling a small-head flange;
4) roughly boring a large-head flange;
5) welding a process baffle in the large-head flange;
6) the special machine tool comprises a T-shaped workbench, bases are symmetrically arranged at two ends of the T-shaped workbench respectively, sliding guide rails are arranged on the bases respectively, a mechanical sliding table is arranged on the sliding guide rails, a driver with a boring tool bit is arranged on the mechanical sliding table, and a boring tool bar is arranged on the boring tool bit;
7) the inner hole of the large-head flange is roughly and finely bored by a numerical control boring machine, each hole and screw hole on the flange are bored in place, and a process baffle is bored;
8) and rotating the machine tool workbench by 180 degrees, horizontally moving, extending or contracting the boring cutter bar and the ram, correcting the finish machining of the inner hole of the flange at the small-head flange end, and boring and drilling each screw hole on the flange in place.
2. The method for processing the hydro-generator bent spray type nozzle pipe as claimed in claim 1, wherein the method comprises the following steps: in the step 2), a numerical control boring machine is arranged, a screw jack is used for supporting the proper position of the appearance of the nozzle pipe, a bench worker is matched with an electric welder, a clinical welding process pressure plate, a nut and a tensioning screw rod are used for clamping a workpiece, and the bending spraying type nozzle pipe is positioned.
3. The method for processing the hydro-generator bent spray type nozzle pipe as claimed in claim 2, wherein: in the step 3), adjusting a screw jack, clinically marking and correcting a central cross line and an end face processing line of the small-end flange, roughly and finely boring and milling the end face and the excircle of the small-end flange in place, and roughly boring an inner hole to leave a margin single side of 6-7 mm.
4. The method for processing the hydro-generator elbow spray type nozzle pipe as claimed in claim 3, wherein the method comprises the following steps: in the step 4), the workbench is rotated by 180 degrees, the central cross line of the end face of the large-head flange is aligned, the allowance of the end face of the large-head flange for rough boring is 3-4 mm, the allowance of the inner hole for rough boring is 6-7 mm, and the outer circle of the bore is in place.
5. The method for processing the hydro-generator bent spray type nozzle pipe as claimed in claim 4, wherein the method comprises the following steps: in the step 6), a special machine tool is used, a screw jack is used for supporting the proper position of the nozzle pipe in shape, a bench worker is matched with an electric welder, and a clinical welding process press plate, a nut and a tensioning screw rod are used for loading and pressing a workpiece; and (3) correcting the center and the plane of the machined small-end flange by a clinical marking table, fixing and firmly pressing the workpiece, adjusting the positions of the mechanical sliding tables at the two ends, and roughly and finely boring the inner hole of the small-end flange and the inner hole of the large-end process baffle in place.
6. The method for processing the hydro-generator bent spray type nozzle pipe as claimed in claim 5, wherein the method comprises the following steps: in the step 7), a numerical control boring machine is mounted, a screw jack is used for supporting the proper position of the nozzle pipe in the shape, a bench worker is matched with an electric welder, and a clinical welding process pressing plate, a nut and a tensioning screw rod are used for clamping a workpiece; and (3) correcting the center of the inner hole of the finish-machined large-head process baffle by a clinical dial, fixing and pressing the workpiece firmly, roughly and finely boring the inner hole, the end face and the ring groove of the large-head flange in place, boring and drilling each hole and screw hole on the flange in place, and boring off the process baffle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010350258.XA CN111451730B (en) | 2020-04-28 | 2020-04-28 | Method for machining bent spraying type nozzle pipe of hydraulic generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010350258.XA CN111451730B (en) | 2020-04-28 | 2020-04-28 | Method for machining bent spraying type nozzle pipe of hydraulic generator |
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| CN111451730A CN111451730A (en) | 2020-07-28 |
| CN111451730B true CN111451730B (en) | 2022-06-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE2615738C2 (en) * | 1976-04-10 | 1984-03-29 | Laeis-Werke Ag, 5500 Trier | Roller and method for the non-cutting manufacture of the same |
| CN101633091A (en) * | 2008-07-21 | 2010-01-27 | 鞠小平 | Method for processing differential case assembly |
| CN202411768U (en) * | 2011-12-16 | 2012-09-05 | 重庆水轮机厂有限责任公司 | Processing device for light rail cast steel support saddle key groove |
| CN103386589A (en) * | 2013-07-16 | 2013-11-13 | 江苏亚梅泵业集团有限公司 | Machining method of self-priming pump bracket |
| CN105033284B (en) * | 2015-06-25 | 2018-01-12 | 温州大学激光与光电智能制造研究院 | The method of synchronous processing rear axle housing welded assembly both ends ring flange |
| CN107097029B (en) * | 2017-03-31 | 2019-11-22 | 绍兴三强机电科技有限公司 | It is a kind of can in external welding large double-flange cylinder automatic centering welding tooling |
| CN108705268B (en) * | 2018-08-15 | 2020-05-19 | 江苏振江新能源装备股份有限公司 | Land wind driven generator flange machining process |
| CN110757106A (en) * | 2019-11-21 | 2020-02-07 | 衡阳风顺车桥有限公司 | Machining process for rear axle housing of electric automobile |
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